Susan Winebrenner, Dina Brulles. The cluster grouping handbook : how to challenge gifted students and improve achievement for all / Susan Winebrenner, Dina Brulles. - Minneapolis, MN : Free Spirit Pub., c2008 - 4 3/4 inch Subjects--Topical Terms: Gifted children -- --United States--Education -- Dewey Class. No.: 371.956